Priced at £29,995 - £5000 more than the standard E10 - the E10 S is powered by a mid-mounted 2.0-litre Ford GDTI EcoBoost engine producing 250bhp. By comparison, the standard E10 gets 197bhp from its naturally aspirated 2.0-litre Ford GDI engine. A range of transmission options is also available.

Zenos says the E10 S is capable of sprinting from 0-60mph in less than 4.5sec and has a top speed of 135mph. Available in both left and right-hand drive, the E10 S keeps the same styling as the standard E10 and is also road-legal.

Like its sibling, the E10 S is based around an aluminium extrusion and carbonfibre tub construction, which keeps overall weight down - the E10 S weighs in at 725kg - while increasing torsional rigidity. A windscreen has also been added to the S.

Company co-founder and former Caterham Cars CEO Ansar Ali told Autocar at the Autosport International show that 50 per cent of the company's budgeted production E10 S cars for this year have already found buyers.

Customers who had already put down deposits for the E10 were offered the chance to upgrade to the E10 S, with most taking the chance. Production of both the E10 and E10 S is under way, with first deliveries planned for early March this year.

The E10 is the first of three models from Zenos cars to be introduced over the next five years. Also planned is the E11 roadster and E12 coupé, which are due to arrive in 2016 and 2018 respectively. Both will use the same aluminium extrusion structure as the E10.